EP1164321A2 - Spool valve and method for manufacturing the same - Google Patents
Spool valve and method for manufacturing the same Download PDFInfo
- Publication number
- EP1164321A2 EP1164321A2 EP01114482A EP01114482A EP1164321A2 EP 1164321 A2 EP1164321 A2 EP 1164321A2 EP 01114482 A EP01114482 A EP 01114482A EP 01114482 A EP01114482 A EP 01114482A EP 1164321 A2 EP1164321 A2 EP 1164321A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- collars
- connection
- spool valve
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/598—With repair, tapping, assembly, or disassembly means
- Y10T137/6007—Assembling or disassembling multi way valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/8667—Reciprocating valve
- Y10T137/86694—Piston valve
- Y10T137/8671—With annular passage [e.g., spool]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
- Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
- Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
- Y10T29/49416—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
- Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
- Y10T29/49416—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting
- Y10T29/49423—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting including metal deforming
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49925—Inward deformation of aperture or hollow body wall
- Y10T29/49927—Hollow body is axially joined cup or tube
Definitions
- the invention relates to a spool valve, such as oil valves and the like, incorporated into hydraulic control circuits of automatic transmissions of an automobile or the like to perform switching of oil flow passages.
- Spool valves have been manufactured by machining a rod material by means of a lathe or the like, in which there are many problems that a material discarded as chip is much in amount, machining takes time and stress relieve is essential in the case where application of heat treatment such as carburization or the like generates stress of heat treatment to distort a shaft.
- a spool valve in which collars are fixed to a shaft by fitting a plurality of collars onto a shaft material in predetermined positions, and using a rolling die to reduce the shaft material at both ends of the collars in diameter to cause plastic flow of metal to form annular ridges.
- Such collars involve, in addition to a problem that being a ring-shaped solid body, they are heavy, problems that provision of oil drain holes necessitates boring by a drill, which takes time and man-hour and the manufacturing cost is increased by waste of a material caused by punching a central hole in a rod material, which allows fitting onto a shaft.
- the invention has been devised to solve the above-mentioned problems of the prior art and enable manufacturing collars having a small thickness and to provide a spool valve provided with collars, which are lightweight and high in yield of material.
- a spool valve according to the invention has a plurality of small-diameter portions formed at predetermined spacings on a peripheral surface of a shaft, and pairs of annular ridges on peripheral surfaces of the small-diameter portions to have a larger diameter than an inner diameter of collars, the collars being closely fitted between the annular ridges to make valve bodies, characterized in that the collars comprise an inner wall, an outer wall and at least one connection therebetween, the connection are formed of the same material as that of the inner wall and outer wall, and connect the inner wall and the outer wall integrally to each other at predetermined positions on the inner wall and the outer wall, and an annular gap is provided between the inner wall and the outer wall.
- the collars can be used which are formed with oil drain holes, as desired.
- a method for manufacturing a spool valve comprises the steps of: fitting onto a shaft material and aligning in predetermined positions a plurality of collars, which are manufactured by forming a metallic sheet and comprise an annular gap between an inner wall and an outer wall; and using a rolling die to reduce the shaft material around both ends of the respective collars in diameter to cause plastic flow of metal to form at both ends of the respective collars annular ridges having a larger diameter than an inner diameter of the collars to thereby fix the respective collars to the shaft.
- oil drain holes can be provided on the respective collars by punching, as desired.
- Fig. 1 shows a spool valve 5 having a shaft 2 with a plurality of collars 4 (three of them being shown in the figure and suitably increased or decreased in number, as desired) fitted onto the shaft, the shaft 2 having a flange 1 on one end thereof.
- the collars of a first embodiment described later are shown in the figure.
- the respective collars 4 are formed at both ends of an inner wall 4iw thereof with enlarged-diameter recesses 7a, 7b, and small-diameter portions 8 are formed by using a rolling die to reduce a shaft stock in diameter adjacent to positions where the collars are arranged, such that plastic flow of a metallic material constituting the shaft stock extrudes the metallic material from the small-diameter portions to form a pair of annular ridges 9, which closely fit in the recesses to fix the collars to the shaft 2 to make the spool valve 5.
- the collars can be formed from a metal such as aluminum, steel and the like or alloys thereof, and surface hardening such as carburization or the like can be further applied to such metal as desired to give wear resistance to the same.
- the spool valve 5 constituted in the above-mentioned manner is incorporated into hydraulic control circuits of automatic transmissions or the like such that it performs switching of oil flow passages by sliding of the shaft 2.
- the collars 4 fixed to the spool valve 5 are surely fixed and will not become loose since the pairs of annular ridges 9 formed on peripheral surfaces of the small-diameter portions 8 of the shaft 2 are closely fitted into the collars. Besides, since carburization can be applied to the surfaces of the collars to harden the same, the collars are able to adequately withstand frequent switching actions of oil flow passages, and so switching actions of oil flow passages can be positively performed over a long term.
- the enlarged-diameter recesses 7a, 7b are related to the annular ridges 9 such that they are not substantially tapered but stepped. Also, of course, the enlarged-diameter recesses 7a, 7b may not be formed on the collars 4 and pairs of annular ridges 9 abutting against both end surfaces of the collars may be instead formed on peripheral surfaces of the small-diameter portions 8 of the shaft 2.
- Fig. 5 shows a collar 4 according to a first embodiment, which comprises an outer wall 4ow and an inner wall 4iw, respectively, the both walls being formed of the same material and integrally connected at their one ends to each other (the reference numeral 4c denote connections).
- a space between the outer wall and the inner wall is an annular gap 3.
- a metallic sheet 10 having a predetermined thickness (for example, around 1 mm) is cold or warm drawn into a U-shaped configuration from above by a working machine such as a press or the like (see Fig. 2, An arrow in the figure indicates a direction, along which drawing is performed). Subsequently, a central portion of the sheet is pressed from below to be drawn in an opposite direction, whereby a central hole 11 is formed (although at this time, an enlarged-diameter recess 7a is simultaneously formed, an operation such as pressing by a tool die may be performed if the desired configuration of the enlarged-diameter recess is requested. Also, in this operation, the annular gap 3 is formed between the outer wall and the inner wall. See Fig. 3.
- An arrow in the figure indicates a direction, along which drawing is performed when the central hole is formed), and a metallic sheet 12 at a central portion is punched by a punch (See Fig. 4), and further an enlarged-diameter recess 7b is formed by pressing a tool die on an upper end of the central hole 11 where the metallic sheet at the central portion is punched (See Fig. 5).
- Formation of the enlarged-diameter recesses 7a, 7b can be also made by grinding or machining, and further the collars manufactured in this manner can be given wear resistance by heat treatment such as carburization or the like.
- Fig. 9 shows a collar 16 according to a second embodiment, which comprises an outer wall 4ow (correctly, composed of portions 4ow 1 and 4ow 2 ) and an inner wall 4iw, respectively, the both walls being formed of the same material and integrally connected at predetermined positions (while in the figure the positions are axially central as a matter of convenience, they are preferably leftward in the figure in view of mounting of the collar to the shaft) to each other (the reference numeral 4c denotes a connection, which is correctly composed of portions 4c 1 and 4c 2 . As shown in the figure, the connection assumes a configuration, in which the sheet-shaped member 4c 1 and the sheet-shaped member 4c 2 abut against at their front surfaces or rear surfaces.
- sheet-shaped member means that a cross sectional configuration is sheet-shaped. The same applied to the following.).
- annular gap 3 is defined between the outer wall 4ow 2 and the inner wall 4iw (as shown in the figure, the inner wall defining the annular gap assumes a configuration, in which the sheet-shaped member 4iw 1 and the sheet-shaped member 4iw 2 are formed of the same material and connected integrally at one ends 4cc thereof to each other, and front surfaces or rear surfaces thereof abut against each other).
- a collar 16 is manufactured, which has the annular gap 3 between the inner wall and the outer wall 4ow 2 (See Fig. 9). Both ends of the inner walls are rounded as the result of the metallic pipe 13 being folded with a certain curvature, whereby the enlarged-diameter recesses 7a, 7b are formed. Like the first embodiment, additional work may be applied to the corners or the both ends to have the same assuming a desired shape.
- the collar 16 in this embodiment can be made much high in yield of material since only metal in a portion where the oil drain hole 15 is formed is discarded.
- Fig. 12 shows a collar 17 according to a third embodiment, which comprises an outer wall 4ow (correctly, composed of portions 4ow 1 and 4ow 2 ) and an inner wall 4iw (correctly, composed of portions 4iw 1 , 4iw 2 , 4iw 3 ), respectively, the both walls being formed of the same material and integrally connected at predetermined positions (being axially central in the figure) to each other (the reference numeral 4c denotes a connection, which is correctly composed of portions 4c 1 and 4c 2 . As shown in the figure, the connection assumes a configuration, in which the sheet-shaped member 4c 1 and the sheet-shaped member 4c 2 abut against at their front surfaces or rear surfaces).
- annular gap 3 is defined between the outer wall 4ow 1 and the inner wall 4iw 1 and between the outer wall 4ow 2 and the inner wall 4iw 2 (as shown in the figure, the inner walls defining the annular gap assume a configuration, in which the sheet-shaped members 4iw 1 , 4iw 2 and the sheet-shaped member 4iw 3 are substantially formed of the same material and connected integrally at both ends 4cc 1 , 4cc 2 thereof to each other, and front surfaces or rear surfaces thereof abut against each other).
- a metallic sheet 10 having a predetermined length is first wound to provide a metallic pipe 13, or a seamless pipe, a seam welded pipe or the like is cut to a predetermined length to prepare a metallic pipe 13 (see Fig. 6).
- the outer walls 4ow 1 , 4ow 2 are formed by using cold pressing to form flange portions 18a, 18b at both ends of the metallic pipe 13 (See Fig. 10), then applying bending to the flange portions (See Fig. 11.
- arrows indicate directions of work, and circled numerals indicate the order of work), making portions 18ao, 18bo, which have been originally outer peripheral portions of the flange portions, portions 18ai, 18bi, which have been originally inner peripheral portions of the flange portions, and a portion, which has been originally a central portion of the metallic pipe (eventually becomes a portion 4iw 3 of the inner wall.
- the collar 17 having the annular gaps 3 between the inner walls 4iw 1 , 4iw 2 and the outer walls are manufactured (See Fig. 12).
- the process of formation of the enlarged-diameter recesses 7a, 7b is the same as in the second embodiment, and formation of the oil drain hole 15 and the necessity or not of additional works are also optional like those in the second embodiment.
- the collar 17 in this embodiment can be also made much high in yield of material since only metal in a portion where the oil drain hole 15 is formed is discarded.
- Fig. 15 shows a collar 19 according to a fourth embodiment, which comprises an outer wall 4ow and an inner wall 4iw (correctly, composed of portions 4iw 1 , 4iw 2 ), respectively, the both walls being formed of the same material and integrally connected at one ends thereof to each other (the reference numeral 4c denotes a connection, which is correctly composed of portions 4c 1 and 4c 2 .
- the connection assumes a configuration, in which the sheet-shaped member 4c 1 and the sheet-shaped member 4c 2 abut against at their front surfaces or rear surfaces).
- annular gap 3 is defined between the outer wall 4ow and the inner wall 4iw 1 (as shown in the figure, the inner wall defining the annular gap assumes a configuration, in which the sheet-shaped member 4iw 1 and the sheet-shaped member 4iw 2 are formed of the same material and substantially connected integrally at one ends 4cc thereof to each other, and front surfaces or rear surfaces thereof abut against each other).
- the outer wall 4ow is formed by then applying bending to the flange portions, respectively (See Fig. 14.
- arrows indicate a direction of work, and circled numerals indicate the order of work), making a portion 18ao, which has been originally an outer peripheral portion of one of the flange portions, and the other 18a of the flange portions, and a portion 18bi, which has been originally an inner peripheral portion of one of the flange portions, and a portion, which has been originally a central portion of the metallic pipe (eventually becomes a portion 4iw 2 of the inner wall.
- Fig. 18 shows a collar 20 according to a fifth embodiment, which comprises an outer wall 4ow and an inner wall 4iw, respectively, the both walls being formed of the same material and integrally connected at one ends thereof to each other and being made by sheet-shaped members of the same material to abut against each other at a region of the other ends thereof (the reference numeral 4c denotes a connection, which is correctly composed of portions 4c 1 and 4c 2 .
- the other connection 4c 2 assumes a configuration, in which a portion (region of the end) of the sheet-shaped member 4ow and a portion (region of the end) of the sheet-shaped member 4c 2 abut against each other at their front surfaces or rear surfaces).
- an annular gap 3 is a substantially closed space.).
- a portion 18ao which has been originally an outer peripheral portion of one of the flange portions
- a portion 18bo which has been originally an outer peripheral portion of the other of the flange portions
- the portion 18ao will make an outer wall
- a portion 18ai which has been originally an inner peripheral portion of one of the flange portions
- a portion 18bi which has been originally an inner peripheral portion of the other of the flange portions
- the collar 20 having the annular gap 3 between the inner wall and the outer wall is manufactured (See Fig. 18).
- the process of formation of the enlarged-diameter recesses 7a, 7b is the same as in the second embodiment, and formation of the oil drain hole 15 and the necessity or not of additional works are also optional like those in the second embodiment.
- the collar 20 in this embodiment can be also made much high in yield of material since only metal in a portion where the oil drain hole 15 is formed is discarded.
- the collars according to the invention can be readily manufactured by using a thin metallic sheet and forming the same into a desired configuration by means of processing methods such as press or the like, and the collars and hence a spool valve can be made lightweight by forming an annular space between an inner wall and an outer wall to contribute to low fuel consumption in automobiles.
- the collars according to the invention can be made high in yield of material, and be strongly fixed to a shaft by fitting the collars at predetermined positions onto a shaft material, reducing the same in diameter by means of a rolling die and closely fitting onto the enlarged-diameter recesses of the collar a pair of annular ridges, which have been formed by the resulted plastic flow of a metallic material, thus enabling manufacture of lightweight and inexpensive spool valves.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Sliding Valves (AREA)
- Punching Or Piercing (AREA)
- Multiple-Way Valves (AREA)
Abstract
Description
- The invention relates to a spool valve, such as oil valves and the like, incorporated into hydraulic control circuits of automatic transmissions of an automobile or the like to perform switching of oil flow passages.
- Spool valves have been manufactured by machining a rod material by means of a lathe or the like, in which there are many problems that a material discarded as chip is much in amount, machining takes time and stress relieve is essential in the case where application of heat treatment such as carburization or the like generates stress of heat treatment to distort a shaft.
- To solve such problems, the inventors of the present application have devised, as disclosed in Japanese Provisional Patent Publication No. 9-264444, a spool valve, in which collars are fixed to a shaft by fitting a plurality of collars onto a shaft material in predetermined positions, and using a rolling die to reduce the shaft material at both ends of the collars in diameter to cause plastic flow of metal to form annular ridges.
- However, such collars are manufactured in multi-stage processes by cold forging in a cold forging machine after shearing of a rod material to a predetermined length. It has been difficult to manufacture thin collars since in the case of manufacturing collars having a thickness as thin as, for example, 4 mm or less, a rod material cut by shearing causes deformation such as die wear or the like. Also, for the purpose of low fuel consumption in automobiles, it has been demanded to make a weight of an automobile as small as possible. Such collars involve, in addition to a problem that being a ring-shaped solid body, they are heavy, problems that provision of oil drain holes necessitates boring by a drill, which takes time and man-hour and the manufacturing cost is increased by waste of a material caused by punching a central hole in a rod material, which allows fitting onto a shaft.
- The invention has been devised to solve the above-mentioned problems of the prior art and enable manufacturing collars having a small thickness and to provide a spool valve provided with collars, which are lightweight and high in yield of material.
- A spool valve according to the invention has a plurality of small-diameter portions formed at predetermined spacings on a peripheral surface of a shaft, and pairs of annular ridges on peripheral surfaces of the small-diameter portions to have a larger diameter than an inner diameter of collars, the collars being closely fitted between the annular ridges to make valve bodies, characterized in that the collars comprise an inner wall, an outer wall and at least one connection therebetween, the connection are formed of the same material as that of the inner wall and outer wall, and connect the inner wall and the outer wall integrally to each other at predetermined positions on the inner wall and the outer wall, and an annular gap is provided between the inner wall and the outer wall. In addition, the collars can be used which are formed with oil drain holes, as desired.
- Also, A method for manufacturing a spool valve, according to the invention, comprises the steps of: fitting onto a shaft material and aligning in predetermined positions a plurality of collars, which are manufactured by forming a metallic sheet and comprise an annular gap between an inner wall and an outer wall; and using a rolling die to reduce the shaft material around both ends of the respective collars in diameter to cause plastic flow of metal to form at both ends of the respective collars annular ridges having a larger diameter than an inner diameter of the collars to thereby fix the respective collars to the shaft. In addition, oil drain holes can be provided on the respective collars by punching, as desired.
-
- Fig. 1 is a partial, cross sectional view showing a spool valve provided with collars according to a first embodiment.
- Fig. 2 is a cross sectional view showing a step (first drawing of a metallic sheet) of the manufacturing process according to the first embodiment.
- Fig. 3 is a cross sectional view showing a step (second drawing of the metallic sheet) subsequent to the step shown in Fig. 2.
- Fig. 4 is a cross sectional view showing a step (punching of the metallic sheet) subsequent to the step shown in Fig. 3.
- Fig. 5 is a cross sectional view showing a collar according to the first embodiment.
- Fig. 6 is a perspective view showing a step (preparation of a collar material) of the manufacturing process of a collar according to the second embodiment.
- Fig. 7 is a fragmentary perspective view showing a step (formation of a constricted portion) subsequent to the step shown in Fig. 6.
- Fig. 8 is a fragmentary perspective view showing a step (close attaching of the constricted portion) subsequent to the step shown in Fig. 7.
- Fig. 9 is a fragmentary perspective view showing the collar according to the second embodiment.
- Fig. 10 is a cross sectional view showing a step (formation of flanges) of the manufacturing process of a collar according to a third embodiment.
- Fig. 11 is a cross sectional view showing a step (first bending of the flanges) subsequent to the step shown in Fig. 10.
- Fig. 12 is a cross sectional view showing a collar according to the third embodiment.
- Fig. 13 is a cross sectional view showing a step (formation of flanges) of the manufacturing process of a collar according to a fourth embodiment.
- Fig. 14 is a cross sectional view showing a step (first bending of the flanges) subsequent to the step shown in Fig. 13.
- Fig. 15 is a cross sectional view showing a collar according to the fourth embodiment.
- Fig. 16 is a cross sectional view showing a step (first bending of flanges) of the manufacturing process of a collar according to a fifth embodiment.
- Fig. 17 is a cross sectional view showing a step (second bending of the flanges) subsequent to the step shown in Fig. 16.
- Fig. 18 is a cross sectional view showing a collar according to the fifth embodiment.
-
- The invention will be described in detail below with reference to the drawings, which show a part of embodiments of the invention.
- Fig. 1 shows a
spool valve 5 having ashaft 2 with a plurality of collars 4 (three of them being shown in the figure and suitably increased or decreased in number, as desired) fitted onto the shaft, theshaft 2 having aflange 1 on one end thereof. Here, the collars of a first embodiment described later are shown in the figure. - The
respective collars 4 are formed at both ends of an inner wall 4iw thereof with enlarged-diameter recesses diameter portions 8 are formed by using a rolling die to reduce a shaft stock in diameter adjacent to positions where the collars are arranged, such that plastic flow of a metallic material constituting the shaft stock extrudes the metallic material from the small-diameter portions to form a pair ofannular ridges 9, which closely fit in the recesses to fix the collars to theshaft 2 to make thespool valve 5. In addition, the collars can be formed from a metal such as aluminum, steel and the like or alloys thereof, and surface hardening such as carburization or the like can be further applied to such metal as desired to give wear resistance to the same. - The
spool valve 5 constituted in the above-mentioned manner is incorporated into hydraulic control circuits of automatic transmissions or the like such that it performs switching of oil flow passages by sliding of theshaft 2. - The
collars 4 fixed to thespool valve 5 are surely fixed and will not become loose since the pairs ofannular ridges 9 formed on peripheral surfaces of the small-diameter portions 8 of theshaft 2 are closely fitted into the collars. Besides, since carburization can be applied to the surfaces of the collars to harden the same, the collars are able to adequately withstand frequent switching actions of oil flow passages, and so switching actions of oil flow passages can be positively performed over a long term. - In addition, the enlarged-
diameter recesses annular ridges 9 such that they are not substantially tapered but stepped. Also, of course, the enlarged-diameter recesses collars 4 and pairs ofannular ridges 9 abutting against both end surfaces of the collars may be instead formed on peripheral surfaces of the small-diameter portions 8 of theshaft 2. - Fig. 5 shows a
collar 4 according to a first embodiment, which comprises an outer wall 4ow and an inner wall 4iw, respectively, the both walls being formed of the same material and integrally connected at their one ends to each other (thereference numeral 4c denote connections). In addition, a space between the outer wall and the inner wall is anannular gap 3. - Manufacture of the collars can be made in the following manner:
- First, a
metallic sheet 10 having a predetermined thickness (for example, around 1 mm) is cold or warm drawn into a U-shaped configuration from above by a working machine such as a press or the like (see Fig. 2, An arrow in the figure indicates a direction, along which drawing is performed). Subsequently, a central portion of the sheet is pressed from below to be drawn in an opposite direction, whereby acentral hole 11 is formed (although at this time, an enlarged-diameter recess 7a is simultaneously formed, an operation such as pressing by a tool die may be performed if the desired configuration of the enlarged-diameter recess is requested. Also, in this operation, theannular gap 3 is formed between the outer wall and the inner wall. See Fig. 3. An arrow in the figure indicates a direction, along which drawing is performed when the central hole is formed), and ametallic sheet 12 at a central portion is punched by a punch (See Fig. 4), and further an enlarged-diameter recess 7b is formed by pressing a tool die on an upper end of thecentral hole 11 where the metallic sheet at the central portion is punched (See Fig. 5). Formation of the enlarged-diameter recesses - Fig. 9 shows a
collar 16 according to a second embodiment, which comprises an outer wall 4ow (correctly, composed of portions 4ow1 and 4ow2) and an inner wall 4iw, respectively, the both walls being formed of the same material and integrally connected at predetermined positions (while in the figure the positions are axially central as a matter of convenience, they are preferably leftward in the figure in view of mounting of the collar to the shaft) to each other (thereference numeral 4c denotes a connection, which is correctly composed ofportions shaped member 4c1 and the sheet-shaped member 4c2 abut against at their front surfaces or rear surfaces. Here, "sheet-shaped member" means that a cross sectional configuration is sheet-shaped. The same applied to the following.). In addition, in this embodiment, anannular gap 3 is defined between the outer wall 4ow2 and the inner wall 4iw (as shown in the figure, the inner wall defining the annular gap assumes a configuration, in which the sheet-shaped member 4iw1 and the sheet-shaped member 4iw2 are formed of the same material and connected integrally at one ends 4cc thereof to each other, and front surfaces or rear surfaces thereof abut against each other). - Manufacture of the collars can be made in the following manner:
- In this embodiment, a
metallic sheet 10 having a predetermined length is first wound to provide ametallic pipe 13, or a seamless pipe, a seam welded pipe or the like is cut to a predetermined length to prepare a metallic pipe 13 (see Fig. 6). - The inner wall 4iw is formed by caulking the
metallic pipe 13 in a direction of diameter reduction to form a V-shaped or U-shaped constricted portion 14 (See Fig. 7. In the figure, arrows indicate a direction of caulking.), then restraining the metallic pipe at both ends thereof to have inner walls of the constricted portion closely attached to each other, punchingoil drain holes 15 through the inner walls by means of a punch as desired (See Fig. 8. In the figure, an arrow indicates a direction of restraining), and further using a tool die to bend the constricted portion, in which the inner walls are closely attached, into a L-shape. As a result, acollar 16 is manufactured, which has theannular gap 3 between the inner wall and the outer wall 4ow2 (See Fig. 9). Both ends of the inner walls are rounded as the result of themetallic pipe 13 being folded with a certain curvature, whereby the enlarged-diameter recesses collar 16 in this embodiment can be made much high in yield of material since only metal in a portion where theoil drain hole 15 is formed is discarded. - Fig. 12 shows a
collar 17 according to a third embodiment, which comprises an outer wall 4ow (correctly, composed of portions 4ow1 and 4ow2) and an inner wall 4iw (correctly, composed of portions 4iw1, 4iw2, 4iw3), respectively, the both walls being formed of the same material and integrally connected at predetermined positions (being axially central in the figure) to each other (thereference numeral 4c denotes a connection, which is correctly composed ofportions member 4c1 and the sheet-shapedmember 4c2 abut against at their front surfaces or rear surfaces). In addition, in this embodiment, anannular gap 3 is defined between the outer wall 4ow1 and the inner wall 4iw1 and between the outer wall 4ow2 and the inner wall 4iw2 (as shown in the figure, the inner walls defining the annular gap assume a configuration, in which the sheet-shaped members 4iw1, 4iw2 and the sheet-shaped member 4iw3 are substantially formed of the same material and connected integrally at both ends 4cc1, 4cc2 thereof to each other, and front surfaces or rear surfaces thereof abut against each other). - Manufacture of the collars can be made in the following manner:
- Like the second embodiment, in this embodiment, a
metallic sheet 10 having a predetermined length is first wound to provide ametallic pipe 13, or a seamless pipe, a seam welded pipe or the like is cut to a predetermined length to prepare a metallic pipe 13 (see Fig. 6). - The outer walls 4ow1, 4ow2 are formed by using cold pressing to form
flange portions connections collar 17 having theannular gaps 3 between the inner walls 4iw1, 4iw2 and the outer walls are manufactured (See Fig. 12). In addition, the process of formation of the enlarged-diameter recesses oil drain hole 15 and the necessity or not of additional works are also optional like those in the second embodiment. Thecollar 17 in this embodiment can be also made much high in yield of material since only metal in a portion where theoil drain hole 15 is formed is discarded. - Fig. 15 shows a
collar 19 according to a fourth embodiment, which comprises an outer wall 4ow and an inner wall 4iw (correctly, composed of portions 4iw1, 4iw2), respectively, the both walls being formed of the same material and integrally connected at one ends thereof to each other (thereference numeral 4c denotes a connection, which is correctly composed ofportions member 4c1 and the sheet-shapedmember 4c2 abut against at their front surfaces or rear surfaces). In addition, in this embodiment, anannular gap 3 is defined between the outer wall 4ow and the inner wall 4iw1 (as shown in the figure, the inner wall defining the annular gap assumes a configuration, in which the sheet-shaped member 4iw1 and the sheet-shaped member 4iw2 are formed of the same material and substantially connected integrally at one ends 4cc thereof to each other, and front surfaces or rear surfaces thereof abut against each other). - Manufacture of the collars can be made in the following manner:
- Like the third embodiment, in this embodiment, a
metallic pipe 13 having a predetermined length (See Fig. 6) is first prepared, and then cold pressing is used to formflange portions - The outer wall 4ow is formed by then applying bending to the flange portions, respectively (See Fig. 14. In the figure, arrows indicate a direction of work, and circled numerals indicate the order of work), making a portion 18ao, which has been originally an outer peripheral portion of one of the flange portions, and the other 18a of the flange portions, and a portion 18bi, which has been originally an inner peripheral portion of one of the flange portions, and a portion, which has been originally a central portion of the metallic pipe (eventually becomes a portion 4iw2 of the inner wall. In addition, what is made to abut against a portion of the inner wall to finally constitute another portion 4iw1 of the inner wall is the above-mentioned portion 18bi), respectively, abut against each other, and further applying bending (in a direction, in which the portions are partially spaced away from the other 18a of the flange portions) to a part of the portion 18bo, which has been made to abut against each other (portions, the abutting condition of which has not been released in the last bending, finally make a
portion 4c2 of connections between the outer wall and the inner wall). As a result, thecollar 19 having theannular gap 3 between a portion 4iw1 of the inner wall and the outer wall is manufactured (See Fig. 15). In addition, the process of formation of the enlarged-diameter recesses oil drain hole 15 and the necessity or not of additional works are also optional like those in the second embodiment. Thecollar 19 in this embodiment can be also made much high in yield of material since only metal in a portion where theoil drain hole 15 is formed is discarded. - Fig. 18 shows a
collar 20 according to a fifth embodiment, which comprises an outer wall 4ow and an inner wall 4iw, respectively, the both walls being formed of the same material and integrally connected at one ends thereof to each other and being made by sheet-shaped members of the same material to abut against each other at a region of the other ends thereof (thereference numeral 4c denotes a connection, which is correctly composed ofportions other connection 4c2 assumes a configuration, in which a portion (region of the end) of the sheet-shaped member 4ow and a portion (region of the end) of the sheet-shapedmember 4c2 abut against each other at their front surfaces or rear surfaces). In addition, in this embodiment, anannular gap 3 is a substantially closed space.). - Manufacture of the collars can be made in the following manner:
- Like the fourth embodiment, in this embodiment, a
metallic pipe 13 having a predetermined length (See Fig. 6) is first prepared, and then cold pressing is used to formflange portions - Then bending is applied to the flange portions, respectively (See Figs. 16 and 17. In the figure, arrows indicate directions of work), and a portion 18ao, which has been originally an outer peripheral portion of one of the flange portions, and a portion 18bo, which has been originally an outer peripheral portion of the other of the flange portions, are caused to abut against each other (eventually the portion 18ao will make an outer wall, a portion 18ai, which has been originally an inner peripheral portion of one of the flange portions, and a portion 18bi, which has been originally an inner peripheral portion of the other of the flange portions, will make
connections collar 20 having theannular gap 3 between the inner wall and the outer wall is manufactured (See Fig. 18). In addition, the process of formation of the enlarged-diameter recesses oil drain hole 15 and the necessity or not of additional works are also optional like those in the second embodiment. Thecollar 20 in this embodiment can be also made much high in yield of material since only metal in a portion where theoil drain hole 15 is formed is discarded. - While the process of manufacture of the respective collars by the limited processing methods has been described above, it goes without saying that other processing methods can be employed, by which collars in the form shown in Figs. 5, 8, 12, 15 and 18 can be obtained.
- The collars according to the invention can be readily manufactured by using a thin metallic sheet and forming the same into a desired configuration by means of processing methods such as press or the like, and the collars and hence a spool valve can be made lightweight by forming an annular space between an inner wall and an outer wall to contribute to low fuel consumption in automobiles. Also, as compared with the case where collars are manufactured by machining rod materials and cold forging, the collars according to the invention can be made high in yield of material, and be strongly fixed to a shaft by fitting the collars at predetermined positions onto a shaft material, reducing the same in diameter by means of a rolling die and closely fitting onto the enlarged-diameter recesses of the collar a pair of annular ridges, which have been formed by the resulted plastic flow of a metallic material, thus enabling manufacture of lightweight and inexpensive spool valves.
Claims (10)
- A spool valve having a plurality of small-diameter portions formed at predetermined spacings on a peripheral surface of a shaft, and pairs of annular ridges on peripheral surfaces of the small-diameter portions to have a larger diameter than an inner diameter of collars, the collars being closely fitted between the annular ridges to make valve bodies, characterized in that the collars comprise an inner wall, an outer wall and at least one connection therebetween, the connection is formed of the same material as that of the inner wall and outer wall, and connect the inner wall and the outer wall integrally to each other at a predetermined position on the inner wall and the outer wall, and an annular gap is provided between the inner wall and the outer wall.
- The spool valve according to claim 1, wherein the connection is present on one ends of the inner wall and the outer wall, and the inner wall, the outer wall and the connection are composed of a continuous sheet-shaped material.
- The spool valve according to claim 1, wherein the connection is present on other portions than ends of the inner wall and the outer wall, and the inner wall, the outer wall and the connection are composed of a continuous sheet-shaped material, and wherein the inner wall and the connection are caused to abut against each other at front surfaces or rear surfaces thereof through a further connection.
- The spool valve according to claim 1, wherein the connection is present on other portions than ends of the inner wall and the outer wall, and the inner wall, the outer wall and the connection are composed of a continuous sheet-shaped material, and wherein the inner wall and the connection are caused to abut against each other at front surfaces or rear surfaces thereof through two further connections.
- The spool valve according to claim 1, wherein the connection is present on one ends of the inner wall and the outer wall, and the inner wall, the outer wall and the connection are composed of a continuous sheet-shaped material, and wherein the inner wall and the connection are caused to abut against each other at front surfaces or rear surfaces thereof through a further connection.
- The spool valve according to claim 1, wherein the connections are present on both ends of the inner wall and the outer wall, and the inner wall, the outer wall and the connections are composed of a continuous sheet-shaped material, and wherein one of the connections abuts against front surfaces or rear surfaces at one end and the other end of the sheet-shaped material.
- The spool valve according to any one of claims 1 to 6, wherein the collars are provided with oil drain holes.
- A method for manufacturing a spool valve, comprising the steps of: fitting onto a shaft material and aligning in predetermined positions a plurality of collars, which are manufactured by forming a metallic sheet and comprise an annular gap between an inner wall and an outer wall; and using a rolling die to reduce the shaft material around both ends of the respective collars in diameter to cause plastic flow of metal to form at both ends of the respective collars annular ridges having a larger diameter than an inner diameter of the collars to thereby fix the respective collars to the shaft.
- The method according to claim 8, wherein the collars are ones described in any one of claims 2 to 6.
- The method according to claim 9, wherein oil drain holes are formed on the collars by punching.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000181848A JP3418368B2 (en) | 2000-06-16 | 2000-06-16 | Spool valve and method of manufacturing the same |
JP2000181848 | 2000-06-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1164321A2 true EP1164321A2 (en) | 2001-12-19 |
EP1164321A3 EP1164321A3 (en) | 2003-03-12 |
Family
ID=18682713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01114482A Withdrawn EP1164321A3 (en) | 2000-06-16 | 2001-06-15 | Spool valve and method for manufacturing the same |
Country Status (3)
Country | Link |
---|---|
US (2) | US6520210B2 (en) |
EP (1) | EP1164321A3 (en) |
JP (1) | JP3418368B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008032884A1 (en) | 2008-07-14 | 2010-01-21 | Behr Thermot-Tronik Gmbh | Valve device i.e. piston slide valve device, for controlling load fluid stream e.g. load air, in heat exchanger of loading system, has sealing elements for sealing gap, where elements produce force in direction of slide valve or housing |
CN110886883A (en) * | 2018-09-07 | 2020-03-17 | 浙江盾安禾田金属有限公司 | Four-way valve body and manufacturing process thereof |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8011385B2 (en) * | 2008-01-29 | 2011-09-06 | Eaton Corporation | Valve assembly and method of assembly |
DE102009040288B4 (en) * | 2009-09-04 | 2015-08-20 | Festo Ag & Co. Kg | valve means |
DE102010049935B4 (en) * | 2010-10-28 | 2016-04-07 | Festo Ag & Co. Kg | valve means |
CN102049669B (en) * | 2010-11-18 | 2012-07-11 | 山东大学 | Production technology for left valve barrel of colliery three-purposed hydraulic valve |
EP3409988B1 (en) * | 2017-05-31 | 2020-04-01 | Hamilton Sundstrand Corporation | Pneumatic servo valve with adjustable metering members |
CN113059325B (en) * | 2021-03-31 | 2023-01-20 | 贵州航天天马机电科技有限公司 | Precision forming method for large-size variable-curvature thin-wall storage tank diaphragm |
Citations (1)
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JPH09264444A (en) | 1996-01-24 | 1997-10-07 | Aoyama Seisakusho:Kk | Spool valve and manufacture thereof |
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US139463A (en) * | 1873-06-03 | Improvement in piston-valves | ||
US2370371A (en) * | 1943-08-19 | 1945-02-27 | Brake Equipment & Supply Co | Valve piston |
US2471285A (en) * | 1944-11-08 | 1949-05-24 | David Y Rice | Valve |
DE1092739B (en) * | 1958-09-03 | 1960-11-10 | Ibrepa G M B H | Self-tightening sealing ring |
US3976103A (en) * | 1973-10-19 | 1976-08-24 | Rockford Servo Corporation | Sliding spool type valve and method of making the same |
DE2645327A1 (en) * | 1975-10-09 | 1977-04-21 | Mark Clair Christensen | Annular seal with abrasion resistant coating - has core of resilient material with U-shaped cover for use on piston rods |
US4750511A (en) * | 1986-12-22 | 1988-06-14 | General Motors Corporation | Fluid pressure spool valve and method of controlling pressure forces acting thereon |
ES2064018T3 (en) * | 1990-08-31 | 1995-01-16 | Festo Kg | VALVE OF SEVERAL WAYS. |
JP2657333B2 (en) * | 1991-07-30 | 1997-09-24 | 本田技研工業株式会社 | Valve assembly method and assembly confirmation method |
DE4131830C3 (en) * | 1991-09-20 | 2000-03-23 | Mannesmann Ag | Tappet for slide valves |
US5392516A (en) * | 1994-05-19 | 1995-02-28 | The United States Of America As Represented By The Secretary Of The Army | Method for forming a spool valve sleeve |
JP3418358B2 (en) * | 1999-07-30 | 2003-06-23 | 株式会社青山製作所 | Spool valve |
-
2000
- 2000-06-16 JP JP2000181848A patent/JP3418368B2/en not_active Expired - Fee Related
-
2001
- 2001-06-07 US US09/876,783 patent/US6520210B2/en not_active Expired - Fee Related
- 2001-06-15 EP EP01114482A patent/EP1164321A3/en not_active Withdrawn
-
2002
- 2002-11-21 US US10/301,251 patent/US6675477B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09264444A (en) | 1996-01-24 | 1997-10-07 | Aoyama Seisakusho:Kk | Spool valve and manufacture thereof |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008032884A1 (en) | 2008-07-14 | 2010-01-21 | Behr Thermot-Tronik Gmbh | Valve device i.e. piston slide valve device, for controlling load fluid stream e.g. load air, in heat exchanger of loading system, has sealing elements for sealing gap, where elements produce force in direction of slide valve or housing |
DE102008032884B4 (en) * | 2008-07-14 | 2018-09-20 | Mahle International Gmbh | Valve device, heat exchanger and charging system for charging an internal combustion engine with a charging fluid |
CN110886883A (en) * | 2018-09-07 | 2020-03-17 | 浙江盾安禾田金属有限公司 | Four-way valve body and manufacturing process thereof |
Also Published As
Publication number | Publication date |
---|---|
US20030070296A1 (en) | 2003-04-17 |
US6675477B2 (en) | 2004-01-13 |
JP2002005312A (en) | 2002-01-09 |
US20010052369A1 (en) | 2001-12-20 |
EP1164321A3 (en) | 2003-03-12 |
JP3418368B2 (en) | 2003-06-23 |
US6520210B2 (en) | 2003-02-18 |
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